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On Sunday, September 3, 2023 at 6:05:43 AM UTC-7, Jim Wilkins wrote:
> There are clever devices using bypassed tech from our own past that have
> been difficult to decipher, the Antikythera device being a prime example.
> The Pyramids and Inca stone walls have provoked alien tech explanations from
> writers who weren`t practical problem-solving engineers. The inaccurate
> Egyptian value for Pi disproves such influence. They used 256/81, less
> accurate than 22/7.
I once learned from a Martin Gardner column in Scientific American
that if you took the easy-to-remember sequence 113355 and divided the
last 3 digits by the first 3 digits that the result would be pi with
an accuracy to 5 or 6 decimal places. This curiosity has stuck with
me for at least 6 decades...
>
> Before the rise of Rome their Etruscan neighbors created exquisite gold
> jewelry using methods still not fully understood.
https://www.jckonline.com/magazine-article/granulation-reviving-an-ancient-techn
ique/
>
https://en.wikipedia.org/wiki/Etruscan jewelry
>
> There are hints in this ancient manuscript of the craftsmanship techniques:
>
https://www.britannica.com/topic/De-diversis-artibus
> His methods are similar to modern microelectronics assembly, and depend on
> familiarity with the surface tension of molten metal.
>
> The origin of this automaton was unknown until it was repaired and wrote out
> the name of its builder:
>
https://www.fi.edu/en/history-resources/automaton
>
> There`s a functioning automaton like it in the movie "Hugo" that looks
> mechanical but is actually operated by an X-Y plotter moving the hand with a
> magnet under the writing table.
>
> The Hybrid transformer in an old dial telephone and a 60`s era Weco phase
> modulated modem seem to perform magic, as does a magnetic amplifier until
> you learn the non-linear magnetic properties of the core material.
>
> Although they are just wood, the reasons the old violins by Stradivarius and
> Guarnerius sound so good has been very difficult to determine.
>
> The power source of this 1840 perpetual motion device is unknown:
>
https://en.wikipedia.org/wiki/Oxford Electric Bell
>
> I have a 1971 HP 8555A Spectrum Analyzer whose heart is this crystal with
> seemingly magical properties:
>
https://en.wikipedia.org/wiki/YIG sphere
>
> This crystal device has special electromechanical properties that are easily
> determined by using a vector network analyzer:
https://www.spectrumcontrol.com/globalassets/documents/rf2m-us/white-paper---saw
-filter-2018.pdf
>
> Some could be analyzed more thoroughly if there were enough examples that
> one could be sacrificed for dissection, like the IC that I reverse
> engineered for training. It was a good example that contained op amps,
> comparators, voltage references, current mirrors, CMOS logic gates, PNP and
> NPN bipolars, and a power MOSFET. Modern science has many powerful
> analytical tools that the general public and lightly educated science
> writers are unaware of, such as the vector network analyzer.
--- G2/1.0
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